Given that the atomic weight of hydrogen is appoximately 1 gram per mole, use the method above to estimate teh average molecular mass for water vapor

Answer : The average molecular mass of water vapor is, 18 g/mol

Explanation :

Molar mass : It is defined as the sum of the mass of all the atoms each multiplied its atomic masses that are present in the molecular formula of a compound. It is expressed in g/mol.

As we know that,

Atomic weight of hydrogen = 1 g/mole

Atomic weight of oxygen = 16 g/mole

Now we have to calculate the average molecular mass of .

Average molecular mass of =

Therefore, the average molecular mass of water vapor is, 18 g/mol

there are two significant figures.